Cement Energy and Environment

... Table-04 Work Place Particle Termi~al Airborne STE LTE ( COSHH . veloc1ty dust S1ze (~) ( 1 ) ( 3 ) ( mgm-3) mgm-3) (mgm-3) ems mgm - Lime Stone Crusher 2.5 0.37- 0.41 15.2 - 25.4 0.47-0.79 11.40-19.05 4.00 Additive& Coal 2.5 0.31·0.35 12.5-28.5 0.39. 0.89 9.37-21.37 4.00 Dump Hopper Coal handling area 2.5 0.28·0.33 18.2· 25.3 0.56. 0.79 13.65-18.97 2.00 Transfer points 2.5 0.15-.0.19 22.5-32.4 0.70-1 .01 14.06-20.25 4.00 Clinker handling 2.5 0.43-.0.47 24.4 - 25.2 0.76-0.78 18.30-18.90 4.00 Weigh Feeders 2.5 0.38·0.44 18.5. 23.7 0.58 ·0.74 13.85-17.77 4.00 Packaging Platform 2.5 0.41·0.48 17.5- 30.2 0.54-0.94 16.40-28.31 4.00 Truck Loading Area 2.5 0..38·0.45 19.2· 28.5 0.60·0.89 18.00-26.71 4.00 STE- Short term exposure, LTE- Long term exposure 2.5 Risk Assessment The risk assessment is an honest examination to know the presence of undesired substances which may cause harm to work men which in- force us to introspect the existing prevention and precaution to be taken to nullify the harm of hazards. The assessment of toxicity and potentiality to be taken into account, regardless of the intrinsic hazard posed by the dust , fumes and gases, which may have consequences on the health and safety of workers. The risk assessment could be followed as mentioned under. • Identify the hazards • Decide who might be harmed and how • Evaluate the risks and decide on precaution "STEL and LTEL" • Record your findings and implement them • Review the assessment 2.6 Preventive Control Measures of Oust hazards: The fine clay mixed limestone dust falls from 3.5m height to the crusher hopper in suspension stage due it's fineness particle settled with terminal velocity 0.0045m/s it remain in suspension in ambient for 13 minutes which may caused hazardous to health to workmen working near crusher location and crusher control room. The settling of fine particle should be faster to avoid the presence of particulate matter in ambient in suspension stage. An Eco - Friend (Fig-3) was in-house conceptualized equipment to control fugitive emission at work place which can be fabricated in work shop of waste and discarded material 'exhaust fan ,' 'used motor' fitted and a L/ s Packaeln &Section RC!WMIII 2·1. 7~o~m Section 30% 6.1· S~1m 16% Kiln Cement Mill section 3 ·1 . 9~o~m 2.9~•m 24% 20% Fig - 03 water sprinkling nozzle. The whole assembly kept on folded and movable stand . The nozzle is connected with water and compressed air pipe lines. The required air pressure is 3-4kg/m2 and water pressure is 4-5kg/m2 to produce adequate quantity of fog to settle the air born dust by increasing the settling velocity. The Preventive measures, wet drilling adopted that reduced the generation of dust substantially, mettled haulage road with water wet condition Weigh feeder discharge chutes provided with rubber scrapper, required adequate capacity bag filter attached with transfer points to mitigate dust generation. The preventive measures viz. hand Gloves, Nose mask , Full head mask provided to potential effected work person